<script setup>
import {
    Edit,
    Delete
} from '@element-plus/icons-vue'

import { ref, reactive } from 'vue'
import { ElMessage } from "element-plus"
// 富文本编辑器
import { QuillEditor } from '@vueup/vue-quill'
import '@vueup/vue-quill/dist/vue-quill.snow.css'
// token的获取
import { useTokenStore } from '@/store/token.js'
const tokenStore = useTokenStore()


//文章分类数据模型
const categorys = reactive([])

//用户搜索时选中的分类id
const categoryId = ref('')

//用户搜索时选中的发布状态
const state = ref('')

//文章列表数据模型
let articles = reactive([
    {
        "id": 5,
        "title": "陕西旅游攻略",
        "content": "兵马俑,华清池,法门寺,华山...爱去哪去哪...",
        "coverImg": "https://big-event-gwd.oss-cn-beijing.aliyuncs.com/9bf1cf5b-1420-4c1b-91ad-e0f4631cbed4.png",
        "state": "草稿",
        "categoryId": 2,
        "createTime": "2023-09-03 11:55:30",
        "updateTime": "2023-09-03 11:55:30"
    },
    {
        "id": 5,
        "title": "陕西旅游攻略",
        "content": "兵马俑,华清池,法门寺,华山...爱去哪去哪...",
        "coverImg": "https://big-event-gwd.oss-cn-beijing.aliyuncs.com/9bf1cf5b-1420-4c1b-91ad-e0f4631cbed4.png",
        "state": "草稿",
        "categoryId": 2,
        "createTime": "2023-09-03 11:55:30",
        "updateTime": "2023-09-03 11:55:30"
    },
    {
        "id": 5,
        "title": "陕西旅游攻略",
        "content": "兵马俑,华清池,法门寺,华山...爱去哪去哪...",
        "coverImg": "https://big-event-gwd.oss-cn-beijing.aliyuncs.com/9bf1cf5b-1420-4c1b-91ad-e0f4631cbed4.png",
        "state": "草稿",
        "categoryId": 2,
        "createTime": "2023-09-03 11:55:30",
        "updateTime": "2023-09-03 11:55:30"
    },
])

//分页条数据模型
const pageNum = ref(1)//当前页
const total = ref(20)//总条数
const pageSize = ref(3)//每页条数

//当每页条数发生了变化，调用此函数
const onSizeChange = (size) => {
    pageSize.value = size;
    getArticleList();
}
//当前页码发生变化，调用此函数
const onCurrentChange = (num) => {
    pageNum.value = num;
    getArticleList();
}

// 获得当前文章有哪些分类
import { articleCategoryListService } from '@/api/article.js'
const getCurrentCategory = async () => {
    let result = null;
    try {
        result = await articleCategoryListService();
        Object.assign(categorys, result.data);
    } catch (error) {
        ElMessage.error('获取文章分类失败')
        console.log(error)
    }
}
getCurrentCategory()

// 获得文章列表
import { articleListService } from '@/api/article.js'
const getArticleList = async () => {
    let result = null;
    // 设定参数
    let params = {
        pageNum: pageNum.value,
        pageSize: pageSize.value,
        categoryId: categoryId.value ? categoryId.value : null,
        state: state.value ? state.value : null
    }
    try {
        result = await articleListService(params);
        // 此处是数组, 不是对象, 所以不能用Object.assign, 直接使用 = 赋值即可
        articles = result.data.items
        total.value = result.data.total
    } catch (error) {
        ElMessage.error('获取文章列表失败')
        console.log("获取文章列表失败")
        console.log(error)
    }
}
getArticleList()

import { Plus } from '@element-plus/icons-vue'
//控制抽屉是否显示
const visibleDrawer = ref(false)
//添加表单数据模型
const articleModel = reactive({
    title: '',
    categoryId: '',
    coverImg: '',
    content: '',
    state: ''
})
// 上传文件
const uploadSuccess = (result) => {
    articleModel.coverImg = result.data
    console.log(result.data)
}

// 新增文章
let title = ref('添加文章')
import { addArticleService } from '@/api/article.js'
const addArticle = async (type) => {
    let result = null;
    try {
        articleModel.state = type
        // 消除p标签
        articleModel.content = articleModel.content.replace(/<p>/g, '').replace(/<\/p>/g, '')
        result = await addArticleService(articleModel);
        // 给文章添加id值
        articleModel.id = result.data
        console.log('添加完毕后的数据', articleModel)
        ElMessage.success('添加文章成功')
        // 让抽屉消失
        visibleDrawer.value = false
        // 刷新文章列表
        getArticleList()
    } catch (error) {
        ElMessage.error('添加文章失败')
        console.log(error)
    }
}

// 修改文章
import { updateArticleService } from '@/api/article.js'
const updateArticle = async (type) => {
    let result = null;
    try {
        articleModel.state = type
        // 消除p标签
        articleModel.content = articleModel.content.replace(/<p>/g, '').replace(/<\/p>/g, '')
        result = await updateArticleService(articleModel);
        ElMessage.success('修改文章成功')
        console.log('修改完毕后的数据', articleModel)
        // 让抽屉消失
        visibleDrawer.value = false

        // 刷新文章列表
        getArticleList()
    } catch (error) {
        ElMessage.error('添加文章失败')
        console.log(error)
    }
}

// 展示文章抽屉
const showArticleDrawer = (row) => {
    visibleDrawer.value = true
    title = "修改文章"
    // 回显数据
    articleModel.title = row.title
    articleModel.categoryId = row.categoryId
    articleModel.coverImg = row.coverImg
    articleModel.content = row.content
    articleModel.state = row.state
    articleModel.id = row.id;
}
// 清除文章对象
const clearArticleModel = () => {
    articleModel.title = ''
    articleModel.categoryId = ''
    articleModel.coverImg = ''
    articleModel.content = ' '
    articleModel.state = ''
}

// 删除文章
// 点击删除, 删除分类
import { ElMessageBox } from 'element-plus'
import { deleteArticleService } from '@/api/article.js'
let deleteArticle = async (row) => {
    // 提示用户的确认框
    ElMessageBox.confirm(
        '确定要删除这个文章吗?',
        '温馨提示',
        {
            confirmButtonText: '确认',
            cancelButtonText: '取消',
            type: 'warning',
        }
    )
        .then(async () => {
            // 点击确认后, 调用接口
            let result = await deleteArticleService(row.id);
            ElMessage({
                type: 'success',
                message: '删除成功',
            })
            // 调用接口刷新数据
            getArticleList();
        })
        .catch(() => {
            ElMessage({
                type: 'info',
                message: '用户取消了删除',
            })
        })
}

</script>
<template>
    <el-card class="page-container">
        <template #header>
            <div class="header">
                <span>文章管理</span>
                <div class="extra">
                    <el-button type="primary" @click="visibleDrawer = true, title = '添加文章',
                        // 清除数据
                        clearArticleModel()">添加文章</el-button>
                </div>
            </div>
        </template>
        <!-- 搜索表单 -->
        <el-form inline>
            <el-form-item label="文章分类：">
                <el-select placeholder="请选择" v-model="categoryId" style="width: 220px">
                    <el-option v-for="c in categorys" :key="c.id" :label="c.categoryName" :value="c.id">
                    </el-option>
                </el-select>
            </el-form-item>

            <el-form-item label="发布状态：" style="width: 240px">
                <el-select placeholder="请选择" v-model="state">
                    <el-option label="已发布" value="已发布"></el-option>
                    <el-option label="草稿" value="草稿"></el-option>
                </el-select>
            </el-form-item>
            <el-form-item>
                <el-button type="primary" @click="getArticleList()">搜索</el-button>
                <el-button @click="categoryId = '', state = '', getArticleList()">重置</el-button>
            </el-form-item>
        </el-form>
        <!-- 文章列表 -->
        <el-table :data="articles" style="width: 100%">
            <el-table-column label="文章标题" width="400" prop="title"></el-table-column>
            <el-table-column label="分类" prop="category.categoryName"></el-table-column>
            <el-table-column label="发表时间" prop="createTime"> </el-table-column>
            <el-table-column label="状态" prop="state"></el-table-column>
            <el-table-column label="操作" width="100">
                <template #default="{ row }">
                    <!-- 修改文章 -->
                    <el-button :icon="Edit" circle plain type="primary" @click="showArticleDrawer(row)"></el-button>
                    <!-- 删除文章 -->
                    <el-button :icon="Delete" circle plain type="danger" @click="deleteArticle(row)"></el-button>
                </template>
            </el-table-column>
            <template #empty>
                <el-empty description="没有数据" />
            </template>
        </el-table>
        <!-- 分页条 -->
        <el-pagination v-model:current-page="pageNum" v-model:page-size="pageSize" :page-sizes="[3, 5, 10, 15]"
            layout="jumper, total, sizes, prev, pager, next" background :total="total" @size-change="onSizeChange"
            @current-change="onCurrentChange" style="margin-top: 20px; justify-content: flex-end" />
    </el-card>

    <!-- 抽屉 -->
    <el-drawer v-model="visibleDrawer" :title="title" direction="rtl" size="50%">
        <!-- 添加文章表单 -->
        <el-form :model="articleModel" label-width="100px">
            <el-form-item label="文章标题">
                <el-input v-model="articleModel.title" placeholder="请输入标题"></el-input>
            </el-form-item>
            <el-form-item label="文章分类">
                <el-select placeholder="请选择" v-model="articleModel.categoryId">
                    <el-option v-for="c in categorys" :key="c.id" :label="c.categoryName" :value="c.id">
                    </el-option>
                </el-select>
            </el-form-item>

            <!-- 
                el-upload: 会自动调用action中的接口上传文件, 并返回接口的返回值,自动加入到回调函数的参数中

                auto-upload: 是否自动上传
                show-file-list: 是否显示文件列表
                action：设置服务器接口路径
                name：上传的文件字段名
                headers：设置上传的请求头部
                on-success：上传成功的回调函数
             -->
            <el-form-item label="文章封面">
                <el-upload class="avatar-uploader" :auto-upload="true" :show-file-list="false" action="/api/upload"
                    name="file" :headers="{ 'Authorization': tokenStore.token }" :on-success="uploadSuccess">
                    <!-- 此处使用了回显 -->
                    <img v-if="articleModel.coverImg" :src="articleModel.coverImg" class="avatar" />
                    <el-icon v-else class="avatar-uploader-icon">
                        <Plus />
                    </el-icon>
                </el-upload>
            </el-form-item>

            <el-form-item label="文章内容">
                <div class="editor">
                    <quill-editor theme="snow" v-model:content="articleModel.content" contentType="html">
                    </quill-editor>
                </div>
            </el-form-item>
            <el-form-item>
                <el-button type="primary" @click="title == '修改文章' ? updateArticle('已发布') :
                    addArticle('已发布')">发布</el-button>

                <el-button type="info" @click="title == '修改文章' ? updateArticle('草稿') :
                    addArticle('草稿')">草稿</el-button>
            </el-form-item>
        </el-form>
    </el-drawer>
</template>
<style lang="scss" scoped>
.page-container {
    min-height: 100%;
    box-sizing: border-box;

    .header {
        display: flex;
        align-items: center;
        justify-content: space-between;
    }
}

/* 抽屉样式 */
.avatar-uploader {
    :deep() {
        .avatar {
            width: 178px;
            height: 178px;
            display: block;
        }

        .el-upload {
            border: 1px dashed var(--el-border-color);
            border-radius: 6px;
            cursor: pointer;
            position: relative;
            overflow: hidden;
            transition: var(--el-transition-duration-fast);
        }

        .el-upload:hover {
            border-color: var(--el-color-primary);
        }

        .el-icon.avatar-uploader-icon {
            font-size: 28px;
            color: #8c939d;
            width: 178px;
            height: 178px;
            text-align: center;
        }
    }
}

.editor {
    width: 100%;

    :deep(.ql-editor) {
        min-height: 200px;
    }
}
</style>